High-resolution bathymetry data from expedition OSO, Southern Ocean, 2007–2008

Citation

Björn Eriksson (2021) High-resolution bathymetry data from expedition OSO, Southern Ocean, 2007–2008. Dataset version 1. Bolin Centre Database. https://doi.org/10.17043/oden-oso-2007-2008-bathymetry-1

Data

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OSO 2007–2008

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OSO 2007–2008

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Data description

The bathymetric data are provided as processed grids, divided into survey areas, with a grid cell size of 25⁠ – ⁠100 m. The grids are provided both in polar stereographic projection (Antarctic Polar Stereographic, EPSG 3031, true scale at 71° south) and in geographic coordinates (WGS 84, latitude and longitude). The horizontal datum is WGS 84 and the vertical datum is instantaneous sea level, implying that the vertical level has not been corrected for tides. For each projection, the bathymetric data grids are available in four formats: GeoTiff, netCDF, ASCII XYZ and ESRI Arc ASCII grid. Data are also illustrated as JPEG images.

Comments

The data were acquired in austral summer 2007/08 from Swedish icebreaker (IB) Oden during the OSO 2007/08 expedition. A Kongsberg EM122 1°⁠ × 1°⁠, 12 kHz, multibeam echo-sounder was hull-mounted in IB Oden. Position, heading and attitude data were received from a Kongsberg-Seatex Seapath 320 navigation unit (GPS and GLONASS) with attached MRU5 motion sensor. The exact speed of sound at the multibeam transducers was provided by a Valeport Mini SVS/T sound speed and temperature sensor mounted in the sea-chest in Oden’s hull, close to the multibeam transducer arrays. This was interfaced with the multibeam system directly. In addition, sound speed profiles for the entire water column were provided by CTD (Conductivity, Temperature, Depth) stations as well as XBT (Expendable Bathy Thermograph) probes.

The data were collected in a mixture of sea-ice conditions, ranging from 5/10 to 8/10 coverage. Navigation was provided by a Seatex Seapath 320 without local augmentation as this is not available in the area. Sound speed correction was done regularly using data from a Seabird 911+ CTD (conductivity, temperature depth) or Valeport SVP (sound velocity profiler).

The OSO 2007/08 expedition started in Punta Arenas, Chile, and ended in McMurdo Station, Antarctica, and lasted from November 29, 2007, to January 7, 2008. The US National Science Foundation (NSF) chartered IB Oden from the Swedish Maritime Administration and the Swedish Polar Research Secretariat to break the ice outside the Antarctic station McMurdo by the Ross Sea.

Contact information

Email address

[javascript protected email address]

Phone number

+46-8-164719

Postal address

Martin Jakobsson
Department of Geological Sciences
Stockholm University
SE-106 91 Stockholm
Sweden

Metadata

GCMD science keywords

Earth science > Oceans > Bathymetry/seafloor topography > Bathymetry

GCMD location

Ocean > Southern Ocean

Status

Completed

Dataset language

English

Project

Oden Southern Ocean (OSO) 2007/08 expedition

Publisher

Bolin Centre Database

Begin date

2007-11-29

End date

2008-01-07

Dataset version

License

Open Data Commons Attribution License (ODC-By)

DOI

10.17043/oden-oso-2007-2008-bathymetry-1

Published

2021-11-04 15:09:32

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